Electric vehicle structure

Abstract

An electric vehicle structure includes side sills disposed on both sides of a vehicle body, a floor panel fixed at both side ends thereof to the side sills, a battery tray coupled to the lower sides of the side sills to define a battery accommodation space together with the floor panel, an integrated-battery front cross member elongated in the lateral direction of the vehicle body so as to be coupled at both ends thereof to the side sills and to interconnect the front side of the battery tray and the floor panel, and a dash cross member connected to the floor panel and the front upper side of the integrated-battery front cross member and elongated in the lateral direction of the vehicle body.

1 . An electric vehicle structure comprising:
 a first side sill positioned on a first side of a vehicle body and a second sill positioned on a second side of the vehicle body;   a floor panel having a first side end fixed to the first side sill and a second side end fixed to the second sill;   a battery tray coupled to a lower side of each of the first side sill and second side sill to define a battery accommodation space together with the floor panel;   an integrated-battery front cross member elongated in a lateral direction of the vehicle body, the integrated-battery front cross member being coupled to the first side sill at one end and coupled to the second side sill at an other end, and connecting a front side of the battery tray and the floor panel; and   a dash cross member connected to the floor panel and to a front upper side of the integrated-battery front cross member, the dash cross member being elongated in the lateral direction of the vehicle body.   
     
     
         2 . The electric vehicle structure according to  claim 1 , wherein the dash cross member has a sectional shape in which a plurality of closed sections are connected to each other, and is configured to protrude outwardly from a dash panel. 
     
     
         3 . The electric vehicle structure according to  claim 1 , wherein the dash cross member has a shape covering both an upper surface of the floor panel and a front surface of the integrated-battery front cross member, and is coupled to the floor panel and the integrated-battery front cross member. 
     
     
         4 . The electric vehicle structure according to  claim 3 , further comprising a plurality of front side members connected to a front side of the dash cross member,
 wherein the dash cross member is connected to a first A-pillar coupled to the first side sill at a first end, and connected to a second A-pillar coupled to the second side sill at a second end.   
     
     
         5 . The electric vehicle structure according to  claim 4 , further comprising a front sub-frame positioned under the plurality of front side members,
 wherein the front sub-frame is mounted such that rear end portions of the front sub-frame is supported on a lower side of the dash cross member.   
     
     
         6 . The electric vehicle structure according to  claim 4 , wherein the dash cross member is connected to the first and second A-pillars through dash cross extensions. 
     
     
         7 . The electric vehicle structure according to  claim 6 , wherein the plurality of front side members are coupled to the dash cross member through a plurality of front side rear lower members coupled to rear sides of the front side members, and
 wherein the plurality of front side rear lower members are coupled at rear sides thereof to the dash cross member and the integrated-battery front cross member.   
     
     
         8 . The electric vehicle structure according to  claim 7 , wherein the dash cross member has a sectional shape extending from the floor panel and a front upper side of the integrated-battery front cross member toward rear sides of the plurality of front side members, and
 wherein the plurality of front side rear lower members extend from rear sides of the plurality of front side members, and expand in a vertical direction to cover front, upper, and lower sides of the dash cross member.   
     
     
         9 . The electric vehicle structure according to  claim 8 , further comprising a plurality of extension side members coupled to the plurality of front side rear lower members and to the dash cross extensions so as to connect the plurality of front side members to the first and second A-pillars while defining closed spaces surrounding end portions of the dash cross member. 
     
     
         10 . The electric vehicle structure according to  claim 9 , wherein the dash cross extensions are integrally formed with extension upper member portions curved in a shape extending in a direction from a front side of the vehicle body toward a rear upper side of the vehicle body, while defining closed spaces together with the extension side members and extension lower member portions curved in a shape extending in a direction from a front side of the vehicle body toward a rear lower side of the vehicle body. 
     
     
         11 . The electric vehicle structure according to  claim 10 , wherein the extension side members are integrally formed with extension side front upper member portions curved in a shape extending in a direction from a front side of the vehicle body toward a rear upper side of the vehicle body, while corresponding to the extension upper member portions of the dash cross extensions. 
     
     
         12 . The electric vehicle structure according to  claim 3 , wherein the battery tray is provided with a battery lower module inner cross member spaced backward from the integrated-battery front cross member and elongated in the lateral direction of the vehicle body;
 wherein the floor panel includes a floor cross member positioned on the battery lower module inner cross member and elongated in the lateral direction of the vehicle body; and   wherein the floor cross member is coupled to the battery lower module inner cross member.   
     
     
         13 . The electric vehicle structure according to  claim 12 , further comprising a dash upper member elongated in a forward-backward direction of the vehicle body and coupled between the dash cross member and the floor cross member. 
     
     
         14 . The electric vehicle structure according to  claim 12 , wherein the floor panel is formed of an extruded material in a shape in which a plurality of closed sections are connected to each other; and
 wherein the floor cross member is integrally formed with the floor panel by a highest protruding closed section among the closed sections of the floor panel.   
     
     
         15 . The electric vehicle structure according to  claim 12 , wherein the battery accommodation space is provided behind the battery lower module inner cross member. 
     
     
         16 . The electric vehicle structure according to  claim 3 , wherein the battery tray is provided with a plurality of lower module outer side members, a lower module outer front cross member, and a lower module outer rear cross member to surround an outer periphery of the battery accommodation space; and
 wherein the electric vehicle structure further comprises a gasket positioned on each of upper surfaces of the plurality of lower module outer side members, the lower module outer front cross member, and the lower module outer rear cross member.   
     
     
         17 . The electric vehicle structure according to  claim 16 , wherein the lower module outer front cross member located on a front side of the battery tray is coupled to a lower side of the integrated-battery front cross member, with the gasket interposed therebetween;
 wherein the lower module outer rear cross member located on a rear side of the battery tray is coupled to a lower side of the integrated-battery rear cross member, with the gasket interposed therebetween; and   wherein the plurality of lower module outer side members of the battery tray are coupled to lower sides of the first and second side sills, with the gasket interposed therebetween.